Ring Size Adjuster Loose Rings Invisible Reducer Jewelry Guard Sizer Tightener, Fitter, Reducer for Wide Rings, Multiple Resizer & 3 Colors, 6 Sheets /234 Pcs

I use a sizing kit from Amazon. Just don’t cover any of the bits. It’s soft and can be cut to fit. Won’t fit on the charger but there’s plenty so not a problem. https://a.co/d/0dQa2axj